NGC 2423-3 b
NGC 2423-3b is an extrasolar planet[1] approximately 2498 light-years away in the constellation of Puppis. The planet was announced in 2007 to be orbiting the red giant star NGC 2423-3 (which in turn is part of the NGC 2423 open cluster). The planet has a mass at least 10.6 times that of Jupiter. Only the minimum mass is known since the orbital inclination is not known, so it may instead be a brown dwarf.
| Discovery | |
|---|---|
| Discovered by | Mayor et al. |
| Discovery site |  France |
| Discovery date | 21 June 2007 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 2.54 AU (380,000,000 km) |
| Periastron | 1.66 AU (248,000,000 km) |
| 2.1 AU (310,000,000 km) | |
| Eccentricity | 0.21 ± 0.07 |
| 714.3 ± 5.3 d | |
| 2,453,213 ± 21 | |
| 18 ± 10 | |
| Semi-amplitude | 71.5 |
| Star | NGC 2423-3 |
| Physical characteristics | |
| Mass | >10.6 MJ |
This planet was discovered by Christophe Lovis and Michel Mayor in June 2007. Lovis had also found three Neptune-mass planets orbiting HD 69830 in May 2006, also in Puppis.
See also
References
- C. Lovis & M. Mayor (2007). "Two substellar companions in the open clusters NGC 2423 and NGC 4349". Astronomy & Astrophysics. 472: 657–664. arXiv:0706.2174. Bibcode:2007A&A...472..657L. doi:10.1051/0004-6361:20077375.
- SIMBAD NGC 2423 3 b
External links
- "NGC 2423 3". Exoplanet. Archived from the original on 2009-11-25. Retrieved 2008-08-11.
- "Notes for planet NGC 2423 3 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-11.
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